December 2005
Intermediate to advanced
475 pages
12h 6m
English
Content preview from Signals and Systems
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6.13 z-TRANSFORM OF CAUSAL COSINE SEQUENCE
The causal cosine sequence is given by
x(n) = cos (nω) u(n)
Using Euler’s identity, we can write cos (nω) as follow:
The z-transform of above equation is given below.
Let us put α = ejω and β = e −jω in the above expression, we get
we know that 
Substituting the individual ...
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